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Definition of grating:

  1. A harsh sound caused by attrition.
  2. A partition, covering, or frame of parallel or cross bars; a latticework resembling a window grate; as, the grating of a prison or convent.
  3. A system of close equidistant and parallel lines lines or bars, especially lines ruled on a polished surface, used for producing spectra by diffraction; - called also diffraction grating.
  4. A system of close equidistant parallel lines or bars, esp. lines ruled on a polished surface, used for producing spectra by diffraction. Gratings have been made with over 40, 000 such lines to the inch, but those with a somewhat smaller number give the best definition.
  5. of Grate
  6. That grates; making a harsh sound; harsh.
  7. The strong wooden lattice used to cover a hatch, admitting light and air; also, a movable Lattice used for the flooring of boats.


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